What experimental evidence shows that matter consists of small particles?

Answer 1

the particle model of matter states:

1. All matter is made up of very small particles. The particles are much too small to observe with the naked eye or with a light microscope.

2. There are spaces between the particles. The amount of space between the particles is different for different states of matter. For example, gases have much more space between particles than solids do.

3. The particles are attracted to each other. The strength of the attraction depends on the type of material.

Answer 2

Evidence of atoms means that if they exist or not.For that reason we need to observe the objects.If the wavelength of the light is bigger than the size of object then atom can not be observed.However if we use electron microscope which use beam of electrons instead of visible light then we can observe the atoms.So atoms can be observed by using an electron microscope.The diameter of atom is 0.2 nm.Experiments have proved that atoms exist.

Answer 3

1 piece of evidence is that matter has phase changes. For instance water, its proven that water has particles because it goes from ice-water-steam or vapor. That happens because when you heat or increase the kinetic energy of water when it's in its ice state (below 0 degrees Celsius) the particles that make water begin to move faster and so it starts change into liquid water, then if you continue to increase the kinetic energy then it turns into water vapor (over 100 degrees Celsius). Also, that you can separate water into hydrogen and oxygen helps prove there are particles because that means that water is made of 2 base elements, which are gases. For those 2 gases to come together and make liquid means that something chemically happened to the particles that make up oxygen and hydrogen for them to make water so its only safe to assume that there's something more matter than things like that just happen, so there must be particles

Answer 4

Direct method: tunelling microscopy that allow to see individual atoms. Indirect method: the chemical reactions, with their stochiometry.

Answer 5

Matter is everything, Matter is atoms.

Atoms are the fundamental parts of matter. Matter is atoms, sometimes combined with others.

Answer 6

Discoveries of physics in the 20th century: electrons, protons, neutrons, radioactivity, nuclear reactions, atomic force microscopy and many others.